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match-regexp.c

/* $Id: match-regexp.c,v 1.20 2007/03/19 20:04:48 nicm Exp $ */

/*
 * Copyright (c) 2006 Nicholas Marriott <nicm@users.sourceforge.net>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <regex.h>

#include "fdm.h"
#include "match.h"

int   match_regexp_match(struct mail_ctx *, struct expritem *);
void  match_regexp_desc(struct expritem *, char *, size_t);

struct match match_regexp = {
      "regexp",
      match_regexp_match,
      match_regexp_desc
};

int
match_regexp_match(struct mail_ctx *mctx, struct expritem *ei)
{
      struct match_regexp_data      *data = ei->data;
      struct account                *a = mctx->account;
      struct mail             *m = mctx->mail;
      int                      res;
      char                      *cause;
      size_t                         so, eo;

      so = 0;
      eo = m->size;
      switch (data->area) {
      case AREA_HEADERS:
            if (m->body != -1)
                  eo = m->body;
            break;
      case AREA_BODY:
            if (m->body == -1)
                  return (MATCH_FALSE);
            so = m->body;
            break;
      case AREA_ANY:
            break;
      }

      res = re_block(&data->re, m->data + so, eo - so, &m->rml, &cause);
      if (res == -1) {
            log_warnx("%s: %s", a->name, cause);
            xfree(cause);
            return (MATCH_ERROR);
      }
      if (res == 0)
            return (MATCH_FALSE);
      return (MATCH_TRUE);
}

void
match_regexp_desc(struct expritem *ei, char *buf, size_t len)
{
      struct match_regexp_data      *data = ei->data;
      const char              *area = NULL;

      switch (data->area) {
      case AREA_BODY:
            area = "body";
            break;
      case AREA_HEADERS:
            area = "headers";
            break;
      case AREA_ANY:
            area = "any";
            break;
      }

      xsnprintf(buf, len, "regexp \"%s\" in %s", data->re.str, area);
}

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